JPH0351676U

JPH0351676U -

Info

Publication number: JPH0351676U
Application number: JP11382889U
Authority: JP
Priority date: 1989-09-28
Filing date: 1989-09-28
Publication date: 1991-05-20

Description

[Brief explanation of drawings]

第１図は本考案の動力操向装置の第１実施例に
供されるバルブボデイの断面図、第２図Ａは同実
施例のスタブシヤフトの正面図、同図Ｂは同スタ
ブシヤフトのロータを示す拡大図、第３図は本実
施例の断面図、第４図は第３図の―線断面図
、第５図Ａは本実施例のサーボ弁を展開した側断
面図、同図Ｂは同サーボ弁を展開した平断面図、
第６図は本考案の第２実施例を示すバルブボデイ
の断面図、第７図Ａは同実施例のスタブシヤフト
の正面図、同図Ｂは同スタブシヤフトのロータを
示す拡大図、第８図は従来の動力操向装置を示す
断面図、第９図はＡは同従来のサーボ弁を展開し
た側断面図、同図Ｂは同サーボ弁を展開した平断
面図である。２２…スタブシヤフト（入力軸）、２３…ロー
タ、２４…ウオームシヤフト（出力軸）、２５…
バルブボデイ、２７…オイル導入孔、２７ａ，２
７ｂ，２７ｃ…導入孔要素、２８…給排ポート、
３２ａ，３２ｂ…シリンダ室、３４…分配ポート
、３６…オイル排出孔、３６ａ，３６ｂ，３６ｃ
…排出孔要素、４１〜４４…絞り部。 FIG. 1 is a sectional view of a valve body used in a first embodiment of the power steering device of the present invention, FIG. 2A is a front view of a stub shaft of the same embodiment, and FIG. 3 is a sectional view of this embodiment, FIG. 4 is a sectional view taken along the line - - in FIG. 3, FIG. 5A is an expanded side sectional view of the servo valve of this embodiment, and FIG. A cross-sectional plan view of the same servo valve,
6 is a sectional view of a valve body showing a second embodiment of the present invention, FIG. 7A is a front view of a stub shaft of the same embodiment, FIG. 7B is an enlarged view of the rotor of the stub shaft, and FIG. 8 9 is a sectional view showing a conventional power steering device, FIG. 9A is an exploded side sectional view of the conventional servo valve, and FIG. 9B is an exploded plan sectional view of the same servo valve. 22... Stubshaft (input shaft), 23... Rotor, 24... Wormshaft (output shaft), 25...
Valve body, 27...oil introduction hole, 27a, 2
7b, 27c...Introduction hole element, 28...Supply/discharge port,
32a, 32b...Cylinder chamber, 34...Distribution port, 36...Oil discharge hole, 36a, 36b, 36c
...Discharge hole element, 41-44... Throttle part.

Claims

[Scope of utility model registration request]

Between the input shaft that is driven by steering operation and the output shaft that transmits the steering force to the steered vehicle,
A rotor and a valve body are provided, and a throttle portion that is variably controlled by the relative rotational displacement of the input and output shafts is provided between the rotor and the valve body,
When the input and output shafts undergo relative rotational displacement, the oil introduced into the oil introduction hole formed in the substantially radial direction of the valve body is passed through the distribution port, the open throttle section on one side, and the supply/discharge port to the power piston. The oil in the distribution port and supply/discharge port is selectively supplied to one cylinder chamber of the rotor, and the oil in the distribution port and the supply/discharge port is passed through the other constricted part and then through the oil discharge hole drilled approximately in the radial direction of the rotor. A power steering device that returns the oil to a tank, characterized in that the oil introduction hole and the oil discharge hole are formed to be wide open in the longitudinal direction of the distribution port and the discharge port, respectively. .